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Finding the Fourth Proportional to 172,510.60, 258,561.10 and 72,670.60

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Solution

The fourth proportional to 172,510.60, 258,561.10 and 72,670.60 is: 108,919.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    172,510.60 : 258,561.10 = 72,670.60 : x
  2. Step 2: Convert to fraction form
    172,510.60/258,561.10 = 72,670.60/x
  3. Step 3: Cross multiply
    172,510.60x = 258,561.10 × 72,670.60
  4. Step 4: Simplify right side
    172,510.60x = 18,789,790,273.66
  5. Step 5: Solve for x
    x = 18,789,790,273.66/172,510.60
  6. Step 6: Final answer
    x = 108,919.63

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.